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Finding the Fourth Proportional to 236,688.67, 355,036.14 and 78,917.17

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Solution

The fourth proportional to 236,688.67, 355,036.14 and 78,917.17 is: 118,376.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,688.67 : 355,036.14 = 78,917.17 : x
  2. Step 2: Convert to fraction form
    236,688.67/355,036.14 = 78,917.17/x
  3. Step 3: Cross multiply
    236,688.67x = 355,036.14 × 78,917.17
  4. Step 4: Simplify right side
    236,688.67x = 28,018,447,416.52
  5. Step 5: Solve for x
    x = 28,018,447,416.52/236,688.67
  6. Step 6: Final answer
    x = 118,376.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.